μῆνις

Etymology
The etymology is uncertain. The long vowel makes it unlikely that μῆνις is from the same proto-Indo-European root *men- that leads to words like μανία. Cf. 🇨🇬, 🇨🇬, 🇨🇬, . Alternately, following Beekes, a religious word.

Noun

 * 1) rage, wrath, mostly of the wrath of the gods

Inflection
The alternative accusative singular, genitive singular and genitive plural forms with δ are first attested in late antiquity.